/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.sliew.scaleph.engine.flink.kubernetes.operator.spec;

import com.fasterxml.jackson.annotation.JsonProperty;

/**
 * Enum to control Flink job upgrade behavior.
 */
public enum UpgradeMode {

    /**
     * Job is upgraded by first taking a savepoint of the running job, shutting it down and
     * restoring from the savepoint.
     */
    @JsonProperty("savepoint")
    SAVEPOINT,

    /**
     * Job is upgraded using any latest checkpoint or savepoint available.
     */
    @JsonProperty("last-state")
    LAST_STATE,

    /**
     * Job is upgraded with empty state.
     */
    @JsonProperty("stateless")
    STATELESS
}
